Only apply extension throttling quota to sync, not local.

chrome/browser/extensions/settings/settings_api.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "chrome/browser/extensions/settings/settings_api.h"
 
 #include "base/bind.h"
 #include "base/values.h"
 #include "chrome/browser/extensions/extension_service.h"
 #include "chrome/browser/extensions/extensions_quota_service.h"
@@ skipping 10 matching lines @@
 const char* kUnsupportedArgumentType = "Unsupported argument type";
 }  // namespace
 
 // SettingsFunction
 
 SettingsFunction::SettingsFunction()
     : settings_namespace_(settings_namespace::INVALID) {}
 
 SettingsFunction::~SettingsFunction() {}
 
+bool SettingsFunction::ShouldSkipQuotaLimiting() const {
+  // Only apply quota if this is for sync storage.
+  std::string settings_namespace_string;
+  if (!args_->GetString(0, &settings_namespace_string)) {
+    // This is an error but it will be caught in RunImpl(), there is no
+    // mechanism to signify an error from this function.
+    return false;
+  }
+  return settings_namespace_string != "sync";
+}
+
 bool SettingsFunction::RunImpl() {
   {
     std::string settings_namespace_string;
     EXTENSION_FUNCTION_VALIDATE(
         args_->GetString(0, &settings_namespace_string));
     args_->Remove(0, NULL);
     settings_namespace_ =
         settings_namespace::FromString(settings_namespace_string);
     EXTENSION_FUNCTION_VALIDATE(
         settings_namespace_ != settings_namespace::INVALID);
@@ skipping 221 matching lines @@
   DCHECK(BrowserThread::CurrentlyOn(BrowserThread::FILE));
   return UseWriteResult(storage->Clear());
 }
 
 void ClearSettingsFunction::GetQuotaLimitHeuristics(
     QuotaLimitHeuristics* heuristics) const {
   GetModificationQuotaLimitHeuristics(heuristics);
 }
 
 }  // namespace extensions